meanwhile, secretary of state hillary clinton says that the iranian government is to blame for the crash of that nation's currency, which has been plunging from economic sanctions over its nuclear program. that's sparking clashes in the streets of tehran right now where citizens are blaming iran's president mahmoud ahmadinejad, for the currency free fall. here are the details. >> iran's currency down 40% in a week, leading to those propests today in the grand bazaar. it's incredibly difficult to manage a business when the currency is shifting so rapidly in such a short period of time. riot police shut down the protest, also shut down the illegal, yet long tolerated, money changers in tehran. in january of 2011, one u.s. dollar cost 10,000 iranian rials. yesterday, 35,500. big change for one week. the tough economic sanctions mean almost no bank in the world will do business with iran. hence, the country can't sell its oil because no one will handle the transaction. it's led to an extreme shortage of dollars. sanctions also manke it difficut to import goods. they're in short supply. both